Reenforcing base for plastic material



Aug. 23, 1932- G. E. LAND REENFORCING BASE FOR PLASTIC MATERIAL FiledMay8, 1930 INVENTOR Patented Aug. 23, 1932 i P TENT oFF cs GEORGE E/LAND,OF :errrsiacneir, PENNSYLVANIA, ASSIGNOB, BYMnsnnAssIeN; MENTS, TO MARYnames MARKS, or snwroxnnr, rnnnsyzcvnnm Y BEENFORCING BASE FOR PLASTICMATERIAL Application filed May 8,

Mv invention relates to wall construction, and more particularly to areenforcing base for plastic material. I provide a reenforced base forplastic material consisting of a sheet of fibrous material such aspaper, hav- 3 being intimately secured to the side of the sheet awayfrom the plaster by the same operation by which the grooves are formed.

The present invention is an improvement in the base for plastic materialof my 00- pending application Serial No. 359,481, filed May 1, 1929.

Modifications of my invention are shown in the accompanying drawing, inwhich Figure 1 is a view in side elevation of a 9 portion of a wallpartly broken away;

Figure 2 is a cross-sectional view of the portion of the wallillustrated in Figure l; and

Figures 3, 4, 5, and 6 are cross-sectional .5 views of bases constructedin accordance with my invention, showing various shapes of grooves.

A sheet of paper less than three-sixteenths of an inch in thickness willnot of itself support a layer of plaster because of its lack in inherentstrengthj Heretofore metal strips have been used to reenforce andstrengthen a sheet of paper so that it can be used as a plaster base. Inall of the methods heretofore used to associate the metal reenforcingmember with the paper, the strips have been separate parts of the wholeand the means used to hold the strips in place have been costly andslow.

I provide a reenforced plaster base in which the reenforcing strips areof the same shape as the grooves or corrugations and in which thereenforcing strips are attached to thepaper and shaped to the form ofthe grooves by the same press operation.

Referring to the drawing, a sheet of paper 2 is provided withcorrugations 3 to the outer side of which are attached metallicreenforcing channels 4 of the same shape as the corrugations 3. Thereenforcing membersl 1930. Serial N0. 450,680.

are intimately secured to the sheet 2 by" tionsare then made in thepaper and me tallic strips by one operation. By the same operation, themetallic strips are punched to thereby secure the strips to the paper.

' The metallic reenforcing' members may, of

course, be cemented or glued to the paper to form an intimate unionbetween the two.

The grooves may be of various shapes; for example, Flgure 3 showsgrooves of pl-shape,

Figure 4 shows grooves of U-shape, Figure- 5 shows grooves ofsem1-c1rcular channel grooves of exshape, and Figure 6 shows a-ggeratedU-shape.

Where a groove "of an exaggerated U-;

shape is used, as shown in Figure 110 reenforcmg members 6, the metalbythe shape of the groove.

.The ribs or grooves-are. preferably formed 6 are held in place in thedirection of the natural grain of the about two inches apart.

Referring to Figures 1 and 2, the reenforced plaster base fl is securedto aspaced vertical joist 7'by means of nails 8 that are journ'alledthrough the bottom ofthe grooves 3 and the reenforcing members 4; intothe joist7'. g I

Vertical members 9 maybe used either to, add transverse rigidity or toreenforce alayer of plaster 10. that is placed on the base 1; Commercialreenforcingmaterials, such as metal lath or wire netting, may beattached to the backing by means of staples. It will be understood,however, that the attaching may beaccomplished'by lips integral. withbut extending from the stifiening members through the fibrous materialand engaging the vertical members 9 or the commercial reenforcingmaterials.

paper, the grooves being spaced parallel The corrugations in the plasterbase lserve to space the inner side of the base away from the joist 7 adistance that is approximately equal to the thickness of a conventionalwood lath. I

In my plaster backing, I provide maximum transverse rigidity as Well asmaximum longitudinal rigidity in an inexpensive operation.

I further provide for corrugating the paper and fixing the stiffening,members in one operation. In addition to the above, a

plaster backing is provided which presents an unbroken surface for thereception of a layer of plaster. This improves'the bond between the baseandthe plaster.

While I have illustrated and described preferred forms of myi-nvention,it will be understood that it is not thus limited, but

may be otherwise practiced and embodied within the scope ofthe followingclaims:

VI-claim: I v v I 1. ,A backing for plasticmaterial comprising a sheetof fibrous material having spaced parallel corrugations therein andstiffening members for said grooves having integral means extending intothe bodyzof said sheet for securing said membersto said sheet.

2. A backing for plastic material comprising a sheet of paper havingparallel spaced grooves therein extending in the direction of thenatural grain of the paper and stiffening members of the same shape asthegrooves and means uniting said stiffening members to the paper, saidmeans being disposed exclusively on the side of the paper away from theplaster side. V

3. A backing for plasticmaterial:comprising a sheetof fibrous materialhaving spaced parallel grooves therein and stifiening mem bersintimately associated with said grooves,

the stiffening members having lips which penetrate the fibrous materialand engage plaster-reenforcing and backing-stifiening 4, VA backing forplastic material comprising a sheet of fibrous material having spacedparallel grooves therein and stiffening mem- .bers intimately associatedwith said grooves, the stiffening members having lips which penetratethe fibrous material and engage V plast'er-reenforcing; andbacking-stifiening means, the grooves being in the direction of thegrain of the fibrous materiaL In testimony whereof I have hereunto set,

myhand. r V p q I GEORGE E. LAND.

